Process of making disks for centrifugal separator bowls



T. H. MILLER Aug. 2 7, 1935.

PROCESS OF MAKING DISKS FOR CENTRIFUGAL SEPARATOR BOWLS Filed Sept. 21, 1935 the disksQthe'mselvesQ Patented Aug. 217 1 935 nven'eo least rm"metals).Q:

e i ie i li ami s-an 9mnrs ae mnr9 a process for making suchadisksand for improving In "'orde toj dividei hqu purified in" centrifugal jmachines 'intof thin layers, the "bowls are i usually provided with liners come, posedof a number of, thin metal frustro-con'ic'al member's known'm the"'art"as disks, which are kept at the correct distance apart 'byiprojections,

expensive. When caulks are soldered on tinned disks, the heat causes. marks on the opposite side. When they are spot welded before tinning, flux between them and the disk preventsentrance of.

tin and leaves a space that is unsanitary.

Disks made of the recently developed stainless steels would have manydesirable features, but

this material cannot be soldered and the heat necessary to weld so changes the structure of the steel as to destroy its stainless properties.

The object of my invention is to make a disk of one piece of metal, preferably stainless steel,

with no seams and by a process which effects no I changes in the physical structure of the metal.

In making such a disk, I first form a disk blank of thick material having the desired body shape, then emboss spots to raise on one side projections of the shape and height desired for caulks, and 1 then remove from the other side metal of 'a thicknessat least equal to the depth of theindentations made while embossing, thus leaving a smooth surface on theside opposite to'the caulks.

I prefer to form the disk blank in themanner side and corresponding indentations onthe' other side ;.but caulksformed in thatmanner have such narrow lines of contact with the adjacent disk that wear is very rapid, or alternate disks must have caulks in different locations. The indentations opposite the caulks are also harder to clea than a smooth surface. I I also'know that it is old to make disk by bending around and folding back on the J" ROCEss}o "MAkINGDIsKs FoR'fofiN- Z EU BL E KAE E Bert? e foughkeepsiefN. Y., assignor toThe De LavalSeparator Company,;NewYo1-k,r.5 l

.jN-T -faf corpo tion of New-Jersey q :j.

Animal-611isemmmn; e

ms bein 'j insignia? may be made: 7

a one piece iguie 31 iis'a" cross "sectionof 'a disli blank niade f by the aforementioned Lindgren process.

Figure'2 is a similar section of a blank with one caulk embossed therein.

Figure 3 is a similar section of threexcompleted the'near side of the caulks on the inner and outer flanges.

- I first form the blank shown in Fig. 1, wherein b is the disk body, a is the inner flange and c the outer flange. 'The flanges are shown as extending in planes at right angles to the center line; though they may be in the form of frustrums of very broad cones turned either upwardor downward, as shown outer flange.

' By embossing or deformation I then form pro jections e on one side of the disk-1 body, leaving indentations .d on the other side. Fromthe latby the dotted lines on the disks nested together, the inner side. 'of the lower Z disk being shown; This section is taken close to ter side material is removed to the depth of the line Fig. 2, which is flush with, or' below, the bottom of the indentations d, so that this side of.

the diskpresents a smooth surface unbroken'by lines 9 and h, respectively, Fig.2, throughout all the area thereof except. at points-at which .itis

desired'to have caulks. There is .thus'forined a disk, three of which are shownfin Fig. 3, comprising a frustro-conical body bf an inner flange a and an outer flange c; the body having frustro-conical caulks on its under side, the flange a having caulks i on its upperside and the flange.

0' having caulksd'on its lower side.

. In reducing the thickness of the disk from that 1 of Figs. 1 and 2 to that of Fig. 3, the disk may-45 v be put in a lathe, a grinder, or some; other metal-1 I removing I device, and the material above the broken linef'removed, leaving the outside of the frustro-econical portion smooth." The material on" .the flanges a and c'jbetween the desired caulks may be removed by filing, cross milling, or ro-;

tating under a milLwhich, at thedesired locations for caulks, is raised to skipthe caulk metalg By these, or any other workable'procedure persol , I 2,012y589p' '77-; {i p 7 eee disk with caulks formed from rmoving metal from the majorportion of the sinthe original blankand having no crevices, in- "iace ofi said otherside to a depth not less than dentations, projections or other irregularities the depth of said indentations. that would be inaccessible forveasycleaning. 7' 3.2'I'he process of making centrifuge disks with p 7 5 As an alternative procedure caiflksmay jbe integral fcaulks which comprises forming a disk formed on the flanges, as well as on thej' -frustro- I with a frustro-conical body andinternal and exconical body, by embossing to make projections ternal flanges, embossing the frustro-conical body 7 on oneside andibyi ing metaLtothe'bottom to for m ea lks on one side regnowing suflicieng "metal Iromthe; other sideofathe iriistro-eonical '10 Idonot h erein'elaim the herein described body to provide,opposite.the caulks, a smooth 10 Such disks form the subject-matter of a SeDaraLteQSurface flush with the remaining sur ace of that divisional application filed emben'18 l9 sidenvof' thefl vbody, and removing metal trom Serial No. 758,003. r ,j paceib partpoitions of the flanges while leav- What I claim i d protect by Letters ingjbetwenfsaid spaced apart portions, metal 15 Patentis: 1

' vjm 'f rm; 1k V v 15 

